Source of SPECINT is not present. See http://www.spec.org/ to download source.

Modification :
1) in Makefile set SPECINT2000_PATH.
per example : SPECINT2000_PATH = "/opt/SPEC_CPU2000/benchspec/CINT2000"

2) in each benchmark, change main function name.
    * for 164.gzip, main became main_164_gzip
    * for 175.vpr , main became main_175_vpr 
    * ...